Table 1 Studies on ranges of motion associated with hip capsular laxity from arthroscopy and imaging technique for diagnosis
From: Capsular plication in the non-deformity hip: impact on post-operative joint stability
Study | Diagnosis criteria for capsular laxity | Technique used | Sample size | Follow up | |
|---|---|---|---|---|---|
Assessment type | Time to follow up | ||||
M. Belemmi et al. 2014 (Chile et al., 2013) | Capsulotomy for FAIa | No closure | Not mentioned in abstract | Modified Harris Hip score Vail score WOMAC score | 3 & 6 months |
total closure (capsulorrhaphy) | |||||
J. Wylie et al. 2013 (Wylie et al., 2013) | Capsulotomy for FAIa (patients chosen because of symptoms of instability after FAI surgery) | No closure | 13 patients, 14 hips (from 324 patients) | Modified Harris Hip score Hip outcome score | Minimum follow up of 6 months |
Arthroscopic capsular repair | |||||
C.T. Hebert et al. 2014 (Hebert et al., 2014) | Capsulotomy in cadaveric hips | No closure (intraportal capsulotomy) | 10 hips, 5 left, 5 right (range: 28–82 years old) | Rotational force while flexed (90 degrees) and while extended (full) (before & after surgery) | None |
Capsulorrhaphy: (intraportal capsulotomy) | |||||
Capsulorrhaphy: (T capsulotomy) | |||||
Bayne et al. 2014 | Capsulotomy in cadaveric hips | Intact capsule | 13 hips | External rotation torque while in neutral flexion & maximal flexion | None |
Transverse capsulotomy | |||||
Magerkurth et al. 2013 (Magerkurth et al., 2013) | Retrospective assessment of imaging after laxity diagnosis at surgery | Magnetic resonance imaging | 27 patients, 17 positive, 10 negative for hip joint laxity | Measurements of capsular & zona orbicularis thickness | None |
Blakey et al. 2010 (Blakey et al., 2018) | Excessive external rotation at rest + pain | Dynamic MRI | 11 hips (10 patients, averaged 31 years old, range 21–47) | Physical exam (FABER test, FADIR test, recoil test…) Beighton hypermobility score | None |